From the Case for Christ:
But the uniform testimony of the early church was that Matthew...was the author of the first gospel; that John Mark...was the author of the gospel called Mark; and that Luke...wrote both the gospel of Luke and the Acts of the Apostles.
Unfortunately when he got to the specifics we find that Papias didn't "specifically affirm" anything about Mark, he merely repeated what the Presbyter told him.
And the presbyter said this: Mark the interpreter of Peter, wrote down exactly, but not in order, what he remembered of the acts and sayings of the Lord, for he neither heard the Lord himself nor accompanied him, but, as I said, Peter later on. Peter adapted his teachings to the needs [of his hearers], but made no attempt to provide a connected narrative of things related to our Lord. So Mark made no mistake in setting down some things as he remembered them, for he took care not to omit anything he heard nor to include anything false. As for Matthew, he made a collection in Hebrew of the sayings and each translated them as best they could.
The statement itself doesn't describe the written works we recognize as the Gospel according to Mark or Matthew.
Showing tradition and not first hand knowledge.
"The average man does not know what to do with this life, yet wants another one which lasts forever." --Anatole France
™ Version 4.2
